Harrow.



A. LOVSTAD.

HARROW.

APPLICA'HON FILED MAY 21. 1917.

Patented June 11, 1918..

2 sums-sum 1.

Jiffy.

AUGUST LOVSTAD, 0F ALGONA,.IOWA.

HARROW.

Specification of Letters ili'atent. v Patented J 1 11 11, 1918App1ication fi1ed May21,1917. Seria1No.170,007.

To all whom it may concern:

Be it known that I, AUGUST LOVSTAD, a citizen of the United States,residing at Algona, in the county of Kossuth and State of Iowa, haveinvented certain new and useful Improvements in Harrows, of which thefollowing is a specification.

This invention relates to improvements in harrows. One object is toprovide a harrow having a stationary frame and a relatively movableframe, the latter being carried by the former and being provided withthe teeth or knives so that adjustment of the movable frame will permitthe formation, by the said knives or teeth, of 'deep or shallow furrowsor will permit the knives or teeth to be raised entirely off the groundto permit removal of the machine from the fieldor to the field asdesired. With the foregoing and other objects in view the inventionconsists in the combination and ar rangement of parts to be hereinafterfully described, pointed out in the appended claims and illustrated inthe accompanying drawings which form a part of this specification and inwhich- Figure 1 is a plan view of my improved harrow with theframe-levers in section. Fig. 2 is a side elevation of Fig. 1.

Fig. 3 is a section on line 3-3 of Fig. 1.

Fig. 4 is a view similar to Fig. 2 but with the movable parts in analtered position.

Fig. 5 is a section on line 55 of Fig. 4.

Fig. 6 is a front view of one of the harrow bl d a es. Like referencecharacters denote corresponding parts through the several views.

e reference numeral 1 denotes the stationary frame which is providedwith the wheels 2 and with corner posts 3 having the heads 4. Upon eachcorner post 3 a sleeve 5 is slidably arranged, said sleeves being formedwith spurs 6 which are secured by bolts 7 to the movable frame 8, thesides of which are preferably formed of the channel pieces or beams asshown. The said frame 8 carries the castings 9 that serve as bearingsfor the shafts 1O whereon the two piece sleeves 11, connected by bolts12, are secured and retained in adjusted position by the set screws 13.The said sleeve sections 11 are formed with the teeth 14. Each sleeve 5is formed with a lug 15 and immediately below the same a lug 16 iscarried by the frame 1, said lugs being engaged by the links 17, 18which li are also connected to a pin 19 which pin 19 is connected by apitman20 to a pin 2lslidably disposed in a vertical slot 22 formed in acasting 23 carried upon each side of the said frame land rising asubstantial distance thereabove. each side of the machine there are twopitmen 20 which run to opposite ends of the machine as shown and thatare connected to a pin 21. The said casting 23 comprises an integral arm24 and a segmental rack 25.

A lever 26 fulcrumed at 27 to each arm 24: is connected by a link 28 tothe said pin 21, said lever terminating in the handle 29. The saidlever, further, is provided with the spring-pressed pawl 30 adapted towork over the teeth of the segment 25. In Fig. 2 the frame 8 is loweredwith relation to the frame 1. To raise the frame 8 the operators, one ateach side of the machine, move the levers 26 into the position shown inFig. 1 thus moving the pitmen 20 into horizontal position and the llnks17, 18 into vertical position and raising the sleeves 5, upon the posts3, together with the frame 8. The dog 30 now engages one of the lowerteeth of the rack 25 to prevent the frame 8 from returning to normal orlowered position with rela tion to the frame 1. By depressing thespring-engaged ends of the pawls to free said pawls from the racks 25the frame 8, through gravity, will again move to lowered position shownin Fig. 2. It is obvious that the frame 8 may be retained in anyintermediate position by resting the paw 30 in engagement with any ofthe intermediate teeth of the racks 25.

What is claimed is 1. In a harrow comprising a wheeled frame, cornerposts carried by said wheeled frame, sleeves slidable upon said cornerposts, a second frame arranged above said tegral "withsaidmastings,leversfulerumed" Ifi'testhnony'thet Fcl'aim the foregoing10 to said eastin? for engagement With"the aS'my'OWn I have heretoaifixed my signasaid segmenta racks, pins; -slidableeinznthec tnre inthe'preeence of two subscribing Witslotted portlons of said castings, links0011- nesses.

5 nesting the said levers and said. pins linkw pivotally connected andengaging sai AUGUST LOVSTAD- sleeves andthe :said- Wheeled frame; andcan Witnesses: nections between the saidkp'mot duli k d, V NEMWN,

the said pin. GI JFl Vbenn.

Copies'oi thlmpgtentmay bembtained for five cents each, bymaddressing fhC611111115k161ie1: 0! Datum,

Washington, D; '0.

